"Game of Thrones" creator George R. R. Martin admits that some fans have correctly guessed how he intends to end the series and he's even considered changing the story's big conclusion.

While attending the Edinburgh International Literary Festival, he told attendees that he's seen a few posters on Internet message boards rightly speculate on the series' secret finale, although most have been off-base, reports the Telegraph.

"At least one or two readers had put together the extremely subtle and obscure clues that I'd planted in the books and came to the right solution," he said.

"So what do I do then? Do I change it! I wrestled with that issue and I came to the conclusion that changing it would be a disaster, because the clues were there.... Some of my readers who don't read the boards -- which thankfully there are hundreds of thousands of them -- will still be surprised and other readers will say: 'See, I said that four years ago, I'm smarter than you guys."'